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        <version>9.7.1</version>
        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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<item>
            <title>[SERVER-40085] Avoid using barriers in TimestampMonitorNotifiesListeners to avoid deadlock in test</title>
                <link>https://jira.mongodb.org/browse/SERVER-40085</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;We should change the usage of barriers in `TimestampMonitorNotifiesListeners` to use a mutex and condition variable instead. Using barriers in this test can lead to a deadlock scenario. &lt;/p&gt;

&lt;p&gt;For example, while the first thread is adding listeners, the timestamp monitor in the second thread can start notifying listeners that were already added by the first thread. While this happens, the timestamp monitor holds its own mutex and waits for the barrier in the test. This prevents the first thread from continuing to add listeners as it needs to grab the timestamp monitors mutex. The deadlock occurs here as the first thread will never hit the barrier that the second thread is waiting for.&lt;/p&gt;</description>
                <environment></environment>
        <key id="715310">SERVER-40085</key>
            <summary>Avoid using barriers in TimestampMonitorNotifiesListeners to avoid deadlock in test</summary>
                <type id="1" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14703&amp;avatarType=issuetype">Bug</type>
                                            <priority id="3" iconUrl="https://jira.mongodb.org/images/icons/priorities/major.svg">Major - P3</priority>
                        <status id="6" iconUrl="https://jira.mongodb.org/images/icons/statuses/closed.png" description="The issue is considered finished, the resolution is correct. Issues which are closed can be reopened.">Closed</status>
                    <statusCategory id="3" key="done" colorName="success"/>
                                    <resolution id="13201">Fixed</resolution>
                                        <assignee username="gregory.wlodarek@mongodb.com">Gregory Wlodarek</assignee>
                                    <reporter username="gregory.wlodarek@mongodb.com">Gregory Wlodarek</reporter>
                        <labels>
                    </labels>
                <created>Tue, 12 Mar 2019 13:22:21 +0000</created>
                <updated>Sun, 29 Oct 2023 22:23:02 +0000</updated>
                            <resolved>Wed, 13 Mar 2019 15:32:09 +0000</resolved>
                                                    <fixVersion>4.1.9</fixVersion>
                                    <component>Storage</component>
                                        <votes>0</votes>
                                    <watches>1</watches>
                                                                                                                <comments>
                            <comment id="2179613" author="xgen-internal-githook" created="Wed, 13 Mar 2019 15:31:38 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Gregory Wlodarek&apos;, &apos;username&apos;: &apos;GWlodarek&apos;, &apos;email&apos;: &apos;gregory.wlodarek@mongodb.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-40085&quot; title=&quot;Avoid using barriers in TimestampMonitorNotifiesListeners to avoid deadlock in test&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-40085&quot;&gt;&lt;del&gt;SERVER-40085&lt;/del&gt;&lt;/a&gt; Avoid using barriers in TimestampMonitorNotifiesListeners&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/422e304a2b3514c1b3f8f3dd452fcd5fc598b51f&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/422e304a2b3514c1b3f8f3dd452fcd5fc598b51f&lt;/a&gt;&lt;/p&gt;</comment>
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